STEVAL-IHM037V1 STMicroelectronics

STEVAL-IHM037V1 Ceiling fan remote control unit based on the STM8 microcontroller Data brief Features Operating voltage: 180-250 V AC Low-cost capacitive power supply for the STM8S003F3 (receiver), and CR2032 coin cell battery for the STM8L101F2 (IR remote) Triac-based speed control with firing angle IR receiver for speed control through RC5 remote Two pushbuttons for speed change RoHS compliant Description The STEVAL-IHM037V1 demonstration board implements speed control for an induction motor- based ceiling fan using a remote control. Traditionally, fan speed is controlled using a Triac- based regulator, which must be operated manually. The STEVAL-IHM037V1 replaces the manual regulator with a remote control-based solution. Two pushbuttons are also provided to increase or decrease fan speed. Speed is regulated by controlling the firing angle of a Triac (T435x) with the STM8S003x microcontroller. February 2013 DocID023317 Rev 2 1/5 www.st.com 5NH 3 9 NH 3 9& VZ 3 3 Schematic diagram STEVAL-IHM037V1 1 Schematic diagram Figure 1. STEVAL-IHM037V1 circuit schematic (1 of 2) - + GDWD 9 + &1& 22 75%/. /,/ , ( 99 ( & -- 9 737 66 22 3 ) QQ ) 9 & 3 && 1157/7 5/ -- : 55 ) Q ) 9 9 9 9 // 22 3 55 . : , && WH V 5 5 66 : : ) S ) 53 -- && ..H H ) 55 P K P LP 9 POOFD TXJN D PS U PL 9 9 . 55 HWV 55 88 & & 55 3 3 GDWD 44 % %& & & & 15 3% 48 && 1 , & 3% 4145 5 5 48 O 6 VRF 96 RXW 3 45. 4 1 9 Q)Q Q) & && 2/5 DocID023317 Rev 2 UH & 26 67 3& 3 3& 3 3& 3 NH . VZ RK R Q) Q S UH NH : . Q & ) X) X 9 & 1 11